I checked the regulator valve and it checks out okay. I ran some checks on the DSI panel per the Technician Repair/Test Manual and it checks out fine. Also, I started the oven on a BAKE cycle at 350 degrees. It starts, preheats gets to 350 degrees and does just fine. I opened the door to the oven and as soon as it gets to less than the selected temp. the ignition kicks on and it lights right up. The BROIL cycle works just fine as well. The unit will still display error code E2 -F1- if you press the CANCEL button for more than 5 seconds. The Cancel button will make some odd sounds if you move your finger around on it while pressing it. Also, on occasion when you press the CANCEL button to stop a BAKE or BROIL cycle it won't stop it unless you press it a second or third time. I had all of the panels off the back of the unit and all of the wiring that I could see and/or illuminate with a flashlight looked just fine. I am becoming more and more convinced that it is the Oven Control (ERC Panel) that has a glitch in it, that only every now and then causes the problem. Perhaps it has something to do with the CANCEL buttons periodic odd behavior. Touch Screens and Digitized buttons are cool looking but not near as durable as good old fashioned knobs and levers. Unless someone thinks I am completely off base I think I will order the ERC panel ($196) and give it a shot! Additionally, I read on another forum that using cleaner (Windex etc.) on these panels, in excess, can cause problems. You guessed it, asked my wife if she has done this in the past and she said "Yes, it was the only way to get the grease from cooking off of it." I guess you are suppose to just use a damp cloth. As you look closely at the backside of the panel (the circuit board) you can see areas along the edge that appear to have had some type of fluid (I'm guessing Windex) leak onto it.